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GPT-5.6 Sol×

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	GPT-5.6 Sol OpenAI	Qwen3.6-27B Alibaba	GPT-5 Pro OpenAI	Gemini Omni Google
Vendor	OpenAI	Alibaba	OpenAI	Google
Family	GPT	Qwen	GPT	Gemini
Release date	2026-06-26	2026-04-22	2025-08-07	2026-05-20
Context window	—	262,144 tokens	400,000 tokens	1,000,000 tokens
Parameters	—	27B (dense)	—	—
Modality	text, vision, audio	text, vision, video	text, vision, audio	text, vision, audio, video
License	proprietary	Apache-2.0	proprietary	proprietary
Source	proprietary	open weights	proprietary	proprietary
Description	Flagship of OpenAI's GPT-5.6 three-model suite (Sol / Terra / Luna), released as a limited preview. Strong gains in coding, cybersecurity, biology, and long-horizon agentic work. Pricing: $5 / $30 per million input/output tokens.	Alibaba's first dense open-weight in the 3.6 family. Strong agentic-coding scores (77.2 SWE-bench Verified, matching Claude 4.5 Opus on Terminal-Bench 2.0). Supports 201 languages and multimodal text/image/video input.	Higher-reasoning variant of GPT-5, used for harder scientific and research tasks (e.g., immunology breakthroughs at NIH). Same 400K context as GPT-5; trades latency for depth.	Multimodal Gemini variant introduced at Google I/O 2026 — unified text, image, audio, and video processing in a single model.
Links	vendor →	weights →	vendor →	vendor →
Benchmarks
MMLU-Pro	—	78.9%	—	—
HumanEval	—	91.5%	—	—
Aider	—	70.2%	—	—
MMMU	—	70.3%	—	82.5%